Actions
All four quadriceps are powerful extensors of the knee joint. They are crucial in walking, running, jumping and squatting. Because rectus femoris attaches to the ilium, it is also a flexor of the hip. This action is also crucial to walking or running as it swings the leg forward into the ensuing step. The quadriceps, specifically the vastus medialis, plays the important role of stabilizing the patella and the knee joint during gait.
Read more about this topic: Quadriceps Femoris Muscle
Famous quotes containing the word actions:
“I judge a man by his actions with men, much more than by his declarations Godwards—When I find him to be envious, carping, spiteful, hating the successes of others, and complaining that the world has never done enough for him, I am apt to doubt whether his humility before God will atone for his want of manliness.”
—Anthony Trollope (1815–1882)
“We cannot assume the injustice of any actions which only create offense, and especially as regards religion and morals. He who utters or does anything to wound the conscience and moral sense of others, may indeed act immorally; but, so long as he is not guilty of being importunate, he violates no right.”
—Karl Wilhelm Von Humboldt (1767–1835)
“Piety practised in solitude, like the flower that blooms in the desert, may give its fragrance to the winds of heaven, and delight those unbodied spirits that survey the works of God and the actions of men; but it bestows no assistance upon earthly beings, and however free from taints of impurity, yet wants the sacred splendour of beneficence.”
—Samuel Johnson (1709–1784)